@article{fdi:37893,
  title = {{C}hanges in school structure according to external stimuli : description and influence on acoustic assessment},
  author = {{F}r{\'e}on, {P}ierre and {G}erlotto, {F}ran{\c{c}}ois and {S}oria, {M}arc},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he study of the internal school structure and behaviour of pelagic fish provides interesting information in relation to acoustic surveys, especially when comparing the undisturbed structure with the structure observed beneath a vessel passing over a school. {T}he methodological approach involves in situ observations and combines acoustic and visual (aerial and underwater) techniques. {T}he internal school structure is heterogeneous, including vacuoles, and this structure changes when the school is overpassed by a vessel during the day. {I}n this case compression of the upper layer of the school is observed. {T}he influence of this school structure on the variability of the density estimation has been studied. {F}or the subsurface schools, the usual rate of sampling may be too low for some heterogenous schools. {O}ther consequences of the school structure on acoustics are discussed. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{POISSON} {MARIN} ; {ESPECE} {PELAGIQUE} ; {ETHOLOGIE} ; {PREDATION} ; {PROSPECTION} {ACOUSTIQUE} ; {BANC} ; {OBSERVATION} {AERIENNE}},
  booktitle = {},
  journal = {{F}isheries {R}esearch},
  volume = {15},
  numero = {},
  pages = {45--66},
  ISSN = {0165-7836},
  year = {1992},
  DOI = {10.1016/0165-7836(92)90004-{D}},
  URL = {https://www.documentation.ird.fr/hor/fdi:37893},
}